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nikklg [1K]
4 years ago
5

Please help on this one!!

Physics
1 answer:
Kipish [7]4 years ago
7 0

4 * 1.9 = 7.6

Answer: D. 7.6

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A car accelerates uniformly from rest to 23 m/s over a distance of 30 meters. What is the acceleration of the car?
kolezko [41]

Answer:

a= 17.69 m/s^2

Explanation:

Step one:

given data

A car accelerates uniformly from rest to 23 m/s

u= 0m/s

v= 23m/s

distance= 30m

Step two:

We know that

acceleration= velocity/time

also,

velocity= distance/time

23= 30/t

t= 30/23

t= 1.30 seconds

hence

acceleration= 23/1.30

accelaration= 17.69 m/s^2

3 0
3 years ago
Estimate the mass of water that must evaporate from the skin to cool the body by 0.55 ∘c. assume a body mass of 100 kg and assum
Gala2k [10]

Heat required to decrease the temperature of body is given as

Q = ms\Delta T

here given that

m = 100 kg

s = 4 J/g ^0C = 4000 J/Kg ^0C

\Delta T = 0.55^0C

now by above equation

Q = 100 \times 4000 \times 0.55

Q = 220,000 J

now in order to evaporate water the heat is given as

Q = mL

220000 = m \times 2.25 \times 10^6

m = 0.097 kg

m = 97 g

so 97 g of water will evaporate from the body

4 0
3 years ago
Read 2 more answers
Explain the term equinox in your own words.
In-s [12.5K]

Answer: Equinox comes from the Latin words aequi, which means "equal," and nox, which means "night." The vernal equinox is considered the first day of spring: finally, the day and night are of equal length.

Explanation: UwU O///O

5 0
3 years ago
A 6.8 KG object moves with a velocity of 8 M/S what’s it's kinetic energy?
FromTheMoon [43]

Answer:

Explanation:

KE = ½mv² = ½(6.8)8² = 217.6 J

round as appropriate because that result is way too much precision for the inputs provided. Arguably should be 200 J based on the single significant digit of the velocity.

8 0
3 years ago
I NEED SOMEONES HELP which statements are true regarding scientific evidence supporting the big bang theory
Elena-2011 [213]
The answer is A,B,C that apply. I believe this is the answer i hope this helps have a good day.
7 0
3 years ago
Read 2 more answers
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